mod_ldap: remove hard-coded loops of 10 retries w/o delay with a configurable

number of retries (LDAPRetries, default 3) and configurable delay between 
retries (LDAPRetryDelay, no delay by default).

The LDAP connection is re-initted every other retry, instead of
on the fifth retry -- this was a much more recent addition then
the basic looping behavior.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1156790 13f79535-47bb-0310-9956-ffa450edef68